Product Summary

The N87C257-150V10 is a high-performance CHMOS microcontroller. The N87C257-150V10 is binary-code compatible with MCS 51 microcontrollers and pin compatible with 40-pin PDIP and 44-pin PLCC MCS 51 microcontrollers. The N87C257-150V10 features an enriched instruction set, linear addressing, and efficient C-language support. The N87C257-150V10 has 512 bytes or 1Kbyte of on-chip RAM and is available with 8 Kbytes or 16 Kbytes of on-chip ROM/OTPROM/EPROM, or without ROM/OTPROM/EPROM. A variety of features can be selected by new user-programmable configurations.

Parametrics

N87C257-150V10 absolute maximum ratings: (1)Storage Temperature: -65℃ to +150℃; (2)Voltage on EA#/VPP Pin to VSS: 0V to +13.0V; (3)Voltage on Any other Pin to VSS: -0.5 V to +6.5 V; (4)IOL per I/O Pin: 15mA; (5)Power Dissipation: 1.5W.

Features

N87C257-150V10 features: (1)Real-time and Programmed Wait State Bus Operation; (2)Binary-code Compatible with MCS51; (3)Pin Compatible with 44-pin PLCC and 40-pin PDIP MCS 51 Sockets; (4)Register-based MCS?251 Architecture 40-byte Register File; (5)Registers Accessible as Bytes, Words, or Double Words; (6)Enriched MCS 51 Instruction Set; (7)Linear Addressing; (8)256-Kbyte Expanded External Code/Data Memory Space; (9)ROM/OTPROM/EPROM Options: 16 Kbytes (SB/SQ), 8 Kbytes (SA/SP), or without ROM/OTPROM/EPROM; (10)16-bit Internal Code Fetch; (11)64-Kbyte Extended Stack Space; (12)On-chip Data RAM Options: 1-Kbyte (SA/SB) or 512-Byte (SP/SQ); (13)8-bit, 2-clock External Code Fetch in Page Mode; (14)Fast MCS 251 Instruction Pipeline; (15)32 Programmable I/O Lines; (16)Seven Maskable Interrupt Sources with Four Programmable Priority; (17)Levels; (18)Three Flexible 16-bit Timer/counters; (19)Hardware Watchdog Timer; (20)Programmable Counter Array; (21)Programmable Serial I/O Port; (22)High-performance CHMOS Technology; (23)Static Standby to 16-MHz Operation; (24)Complete System Development Support.

Diagrams

N87C257-150V10 block diagram

N87C196KB16
N87C196KB16


IC MCU 16-BIT 5V 8K OTP 68-PLCC

Data Sheet

Negotiable 
N87C196KC20
N87C196KC20


IC MCU 16BIT 5V 16K OTP 68PLCC

Data Sheet

Negotiable 
N87C196KD
N87C196KD


IC MCU 16-BIT 5V 32K OTP 68-PLCC

Data Sheet

Negotiable 
N87C196KD20
N87C196KD20


IC MCU 16-BIT 5V 32K OTP 68-PLCC

Data Sheet

Negotiable 
N87C196MC
N87C196MC


IC MCU 16BIT 5V 16K OTP 84-PLCC

Data Sheet

Negotiable 
N87C196MD
N87C196MD


IC MCU 16-BIT 5V 16K OTP 84-PLCC

Data Sheet

Negotiable